Hiya,
So over the holiday I managed to discover my WaveSpa (https://wavespas.com/) used the same Gizwitz api as Lay-z-spa/Bestway etc so I forked the Bestway integration and managed to convert it to work for my WaveSpa Garda. Thanks to this post (Lay-Z-Spa Hot Tub wi-fi pump automation - #60 by gigagigagiga) I was able to make a lot of headway using mitm-proxy and Fiddler. Thank you too all who came before me and hopefully my integration will help anyome else with the same Spa